xoaqwepo: sty in eye

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A large-scale enclosure for raising pigs is generally called a hog lot. Unlike a sty which would be found on a mixed farm, a hog lot is usually a dedicated facility.

The family hog pen was a small-scale system of pig farming which is vastly different from the modern American hog farm. Modern intensive hog farms in the United States have an average of about 2,000 hogs, and large farms raise tens of thousands of hogs. Hog pens were found on family farms of the early 1900's, although backyard pig farming may still occur. In this article the words "hogs" and "pigs" are used interchangeably.

Many family farm hog pens were improvised enclosures made of any material that is handy and free. The size of the pen is often kept small to conserve building material and effort.